The iconic Scrooge is a miser who says "humbug" to sentimentality, especially to Christmas joy. He has no use for love of family, and treats his employees poorly. He's taught a few life lessons when he experiences supernatural visits from four characters.
First, business partner Jacob Marley returns to Earth to warn Ebenezer that if he doesn't change his ways, his fate in the hereafter will be as ugly as Marley's. The Ghost of Christmas Past shows Scrooge his early, happy Christmases, and the incidents that led him to eventually detest the holiday. The Ghost of Christmas Present takes Scrooge on a tour to varied Yule-time scenes, including family festivities at the home of his nephew (Scrooge had declined the nephew's invitation) and to employee Bob Cratchit's home, where Scrooge sees that his meager wages make it impossible for Cratchit to obtain treatment for his sick son. The Ghost of Christmas Yet to Come shows a lonely, dire future, should Scrooge not change his ways. The visits do the trick, and Scrooge spreads joy, cheer and his wealth that holiday and during all Christmases the rest of his life.